createSheet(java.lang.String name,
int index)
Creates, and returns a worksheet at the specified position
with the specified name
If the index specified is less than or equal to zero, the new sheet
is created at the beginning of the workbook.

createSheet

Creates, and returns a worksheet at the specified position
with the specified name
If the index specified is less than or equal to zero, the new sheet
is created at the beginning of the workbook. If the index is greater
than the number of sheet, then the sheet is created at the
end of the workbook.